US Patent Issued to 3M Innovative Properties on Sept. 16 for "Diaphragm for microspeaker and manufacturing method thereof" (Chinese, American Inventors)

ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,418,761, issued on Sept. 16, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Diaphragm for microspeaker and manufacturing method thereof" was invented by Chao Yang (Shanghai) and Christopher B. Walker Jr. (St. Paul, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a diaphragm for a microspeaker and a manufacturing method thereof. The diaphragm is a single-layer diaphragm or a multi-layer diaphragm and comprises at least one layer of a chemically cross-linked thermoplastic polyester elastomer, wherein: the chemically cross-linked thermoplastic polyester elastomer has a loss factor less than or equal to 0.4 at ...